This appendix specifies the HIRF environments and equipment HIRF test levels for electrical and electronic systems under § 29.1317. The field strength values for the HIRF environments and laboratory equipment HIRF test levels are expressed in root-mean-square units measured during the peak of the modulation cycle.

(a) HIRF environment I is specified in the following table:

Table I.—HIRF Environment I

Frequency

Field strength(volts/meter)

Peak

Average

In this table, the higher field strength applies at the frequency band edges.

10 kHz-2 MHz

50

50

2 MHz-30 MHz

100

100

30 MHz-100 MHz

50

50

100 MHz-400 MHz

100

100

400 MHz-700 MHz

700

50

700 MHz-1 GHz

700

100

1 GHz-2 GHz

2,000

200

2 GHz-6 GHz

3,000

200

6 GHz-8 GHz

1,000

200

8 GHz-12 GHz

3,000

300

12 GHz-18 GHz

2,000

200

18 GHz-40 GHz

600

200

(b) HIRF environment II is specified in the following table:

Table II.—HIRF Environment II

Frequency

Field strength(volts/meter)

Peak

Average

In this table, the higher field strength applies at the frequency band edges.

10 kHz-500 kHz

20

20

500 kHz-2 MHz

30

30

2 MHz-30 MHz

100

100

30 MHz-100 MHz

10

10

100 MHz-200 MHz

30

10

200 MHz-400 MHz

10

10

400 MHz-1 GHz

700

40

1 GHz-2 GHz

1,300

160

2 GHz-4 GHz

3,000

120

4 GHz-6 GHz

3,000

160

6 GHz-8 GHz

400

170

8 GHz-12 GHz

1,230

230

12 GHz-18 GHz

730

190

18 GHz-40 GHz

600

150

(c) HIRF environment III is specified in the following table:

Table III.—HIRF Environment III

Frequency

Field strength(volts/meter)

Peak

Average

In this table, the higher field strength applies at the frequency band edges.

10 kHz-100 kHz

150

150

100 kHz-400 MHz

200

200

400 MHz-700 MHz

730

200

700 MHz-1 GHz

1,400

240

1 GHz-2 GHz

5,000

250

2 GHz-4 GHz

6,000

490

4 GHz-6 GHz

7,200

400

6 GHz-8 GHz

1,100

170

8 GHz-12 GHz

5,000

330

12 GHz-18 GHz

2,000

330

18 GHz-40 GHz

1,000

420

(d) Equipment HIRF Test Level 1.

(1) From 10 kilohertz (kHz) to 400 megahertz (MHz), use conducted susceptibility tests with continuous wave (CW) and 1 kHz square wave modulation with 90 percent depth or greater. The conducted susceptibility current must start at a minimum of 0.6 milliamperes (mA) at 10 kHz, increasing 20 decibel (dB) per frequency decade to a minimum of 30 mA at 500 kHz.

(2) From 500 kHz to 40 MHz, the conducted susceptibility current must be at least 30 mA.

(3) From 40 MHz to 400 MHz, use conducted susceptibility tests, starting at a minimum of 30 mA at 40 MHz, decreasing 20 dB per frequency decade to a minimum of 3 mA at 400 MHz.

(4) From 100 MHz to 400 MHz, use radiated susceptibility tests at a minimum of 20 volts per meter (V/m) peak with CW and 1 kHz square wave modulation with 90 percent depth or greater.

(5) From 400 MHz to 8 gigahertz (GHz), use radiated susceptibility tests at a minimum of 150 V/m peak with pulse modulation of 4 percent duty cycle with a 1 kHz pulse repetition frequency. This signal must be switched on and off at a rate of 1 Hz with a duty cycle of 50 percent.